Jelly fish in a bottle

Take a rectangular sheet of plastic paper. pinch its center and tie it loosely like a balloon. Cut the remaining plastic into strips. Pour little water in to the balloon part, that is the head of the jelly fish.

Pour water in a bottle and add food coloring. Then put the jelly fish inside. Shake and move the bottle around to see the jelly fish float. :)

You can cut less number of strips and discard the remaining plastic. It will appear more neat. I didn't have that patience! ;-)